The local villagers have learned to steer clear of the cavernous lair of Blackthorn, the most vicious wyvern in northern Faerun. Ferocious, alert, and with a tail stinger full of venom, Blackthorn is more than a match for any who dare to wander near his caves. When the green dragon Claugiyliamatar sends her hobgoblin follower to recover an ancient tome, the witless minion is overtaken by Blackthorn, who seizes the elder and drags him screaming into the wyvern s lair. Now those who serve the evil dragons, as well as their foes, are eager to recover the hobgoblin s corpse in the hope that he held onto the precious tome which contains information vital to their cause.